Messenkope's Union Square Post Office, New York, (2c) black on pink paper, margins clear of outer oval on three sides, affixed to cover to Amos Street, with partial enclosure dated July 5, 1850, from the Manhattan Gas & Light Company, cover with some tears and adhesive fauty, nevertheless a rare franking, with George B. Sloane guarantee signature on reverse, sent during the early period following the takeover of the company by Joseph E. Dunham from Charles Messenkope; with 2023 Philatelic Foundation certificate